JPH1043165A - Vacuum blood drawing tube - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a vacuum blood drawing tube for visually and easily judging it from the appearance of the blood drawing tube whether pressure inside the blood drawing tube is reduce or not at the time of a blood test. SOLUTION: A discriminating body, which seals gas inside and freely extension/contraction with a pressure change, is provided inside a cylindrical blood drawing tube 3 for which a rubber plug 5 for holding an internal pressure reducing state is attached to the upper part. A plate is horizontally attached for suppressing the float of the discriminating body when pressure inside the blood drawing tube 3 is reduced and a comparative plate, of which the diameter is larger tan that of the discriminating body at the time of compression and smaller than that of the discriminating body at the time of extension/contraction, to be compared with the size of the discriminating body is attached under the discriminating body. Further, a box is housed in the blood drawing tube 3, the discriminating body is attached to one end inside the box, and the box is equipped with a window for discriminating the extension/contraction state of the discriminating body.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a vacuum blood collection tube used in a medical institution such as a hospital for puncturing a skin such as a patient's arm with a syringe needle for blood test and collecting blood from a blood vessel. More specifically, the present invention relates to a vacuum blood collection tube that can easily determine visually whether or not the blood collection tube is in a sufficiently reduced pressure state to suck blood.

[0002]

2. Description of the Related Art Conventionally, in a blood test, one end of an injection needle is pierced into the skin of a patient's arm or the like, and the other end of the injection needle is inserted into a rubber stopper of a blood collection tube in which the inside pressure is reduced. Was drawing blood. However, when the inside of the blood collection tube was not decompressed, blood could not be sucked into the blood collection tube, and a new blood collection tube was taken out again. Must be placed in the rubber stopper of the blood collection tube. At this time, the patient is stuck with a syringe needle for a long time and has to endure long hours of pain,
Alternatively, pain must be caused when the injection needle is inserted again into the rubber stopper of the blood collection tube.

[0003]

SUMMARY OF THE INVENTION The problem to be solved by the present invention is to solve these conventional problems, and it is determined whether or not the inside of the blood collection tube is under reduced pressure during a blood test. It is an object of the present invention to provide a vacuum blood collection tube that can be easily judged visually from the external appearance and that reduces pain of a patient for a long time.

[0004]

Means for Solving the Problems The constitution of the present invention which has solved the above problems is as follows: 1) In a cylindrical vacuum blood collection tube for storing blood, which has a rubber stopper attached to an upper end capable of holding a decompressed state inside, Vacuum blood collection tube, characterized in that a discriminator that is filled with gas and that can expand and contract with pressure changes is provided in the blood collection tube. 2) The discriminator is a balloon that has gas enclosed therein. 3) The vacuum blood collection tube according to 1), wherein the discriminator is attached to an inner side wall of the blood collection tube. 4) The vacuum blood collection tube according to 1) or 2), 4) the discriminator is inside the blood collection tube. 5) The vacuum blood collection tube according to 1) or 2) above, which is attached to a side wall. 5) A discriminator is weighted so as not to float. Vacuum blood collection tube as described 6) The expanded discriminator rises A holding plate is attached horizontally below the blood collection tube, and a comparison plate that is larger in diameter than the discriminator at the time of compression and smaller than the discriminator at the time of expansion and that compares the size with the discriminator is placed below the discriminator. 7) The vacuum blood collection tube according to 1) or 2) above, 7) the comparison plate is translucent or opaque, 8) the vacuum blood collection tube according to 6) above, The vacuum blood collection tube according to the above item 6), which is transparent and has a color different from that of the discriminator. 9) A holding plate for suppressing the floating of the expanded discriminator is mounted below the blood collection tube horizontally below the discriminator. A confirmation plate mounted horizontally on the plate, provided with a confirmation hole through which the state of expansion and contraction of the discriminator can be discriminated; 10) the vacuum blood collection tube according to 1) or 2), A vacuum different from that of the above 9), Blood collection tube 11) A vacuum blood collection tube according to 9) or 10), wherein the label is attached to the holding plate so as to be located directly above the confirmation hole. 12) The label has a different color from the discriminator. Vacuum blood collection tube according to the above item 11) 13) Discrimination such that the color of the discriminator seen through the confirmation hole from the bottom side of the blood collection tube when the discriminator is compressed is different from the color seen when the discriminator is expanded. (9) to (9), wherein the body is colored in two or more colors in a direction perpendicular to the direction of expansion and contraction.
12) Vacuum blood collection tube according to any one of the above 14) In a cylindrical vacuum blood collection tube containing blood, which has a rubber stopper attached to the upper end to maintain the internal decompressed state,
At one end of the box housed in the blood collection tube, a discriminator that is filled with gas and expandable and contractable with a change in pressure is attached, and a window is provided in the box so that the state of expansion and contraction of the discriminator can be determined. Vacuum blood collection tube 15) A vacuum blood collection tube according to 14), wherein a display plate that moves in conjunction with the discriminator is attached to the tip of the discriminator in the direction of expansion and contraction. 16) Display plate Is characterized by being colored in two or more colors in the direction perpendicular to the direction of expansion and contraction of the discriminating body, wherein the vacuum blood collection tube according to the above 15) is a flat box having a flat shape, The vacuum blood collection tube according to the above item 14), wherein a discriminator is attached at the center of the mold box, and a window is provided at the center of the upper surface of the flat box so that the state of expansion and contraction of the discriminator can be determined. The color of the discriminator seen from the window when the discriminator is compressed So as to be different from the color that appears when Zhang,
The vacuum blood collection tube according to the above item 17), wherein the discriminating body is classified into two or more colors. 19) The window, wherein the window has air permeability.
4) Vacuum blood collection tube according to any one of the above items 20) 20) A vacuum blood collection tube according to any one of the above 14) to 19), wherein a vent is provided in the box so that gas can freely enter and exit. 21) Window 14. A vacuum blood collection tube according to any one of the above 14) to 20), wherein a scale is displayed on an outer wall of a peripheral box. 22) A scale is displayed on an inner wall of the box which can be seen from a window. 23) The vacuum blood collection tube according to any one of the above 14) to 22), wherein the color of the discriminator is visible from the window and is different from the inner wall of the box. In a vacuum blood collection tube on a cylinder containing blood, equipped with a rubber stopper that can maintain the internal decompressed state,
A vacuum blood collection tube, characterized in that a window is provided on the outer wall of a box housed in a blood collection tube and filled with gas inside, and a discriminator that is inflatable with the pressure change is attached to the window. 26) The vacuum blood collection tube according to any one of 1) to 24) above, wherein the discriminator has a constricted portion that can expand and contract in the radial direction. 1) The vacuum blood collection tube according to any one of the items 1) to 26), wherein the discriminator is provided with a character, a graphic, or a pattern.

[0005]

In a cylindrical blood collection tube for storing blood collected from a blood vessel, a rubber stopper for sealing the inside is attached to the upper end, and a discriminator is provided inside the blood collection tube that can expand and contract with a change in pressure. Since the inside of this discriminator is filled with gas, the discriminator expands when the inside of the blood collection tube is depressurized, and compresses when the inside of the blood collection tube is at normal pressure. For this reason, when the inside of the blood collection tube is not in a sufficiently decompressed state to suck blood from the blood vessel,
The discriminating body is compressed and the pressure state inside can be easily discriminated even from outside the blood collection tube. Further, below the blood collection tube, a holding plate that holds down the floating discriminator is attached, and a comparison plate of a predetermined size is attached below the discriminator. By comparing the sizes of the comparison plates, it is possible to determine the reduced pressure state inside the blood collection tube. In addition, in the case of a vacuum blood collection tube in which a check plate that holds down a discriminating body that floats is attached below the blood collection tube and a check plate that has a check hole below the discriminator is identified from the check hole on the bottom surface of the blood collection tube. Thereby, the reduced pressure state inside the blood collection tube can be determined. That is, the discriminating body is visible at the time of pressure reduction, and the pressing plate is visible at the time of normal pressure. Further, in the case of a vacuum blood collection tube in which a box is housed inside the blood collection tube, the pressure reduction state inside the blood collection tube can be determined by identifying from the window provided in this box. That is, the discriminator is visible when the pressure is reduced, and the inner wall of the box is visible when the pressure is normal.

[0006]

BEST MODE FOR CARRYING OUT THE INVENTION The balloon according to the present invention may have any shape such as a spherical shape and an elliptical shape. In particular, when a balloon is formed in a star shape, its appearance is obvious at a glance, and it is desirable to easily determine the pressure reduction. The discriminator according to the present invention, for example, a balloon, is made of polyisoprene-based rubber, polyacrylonitonyl, or the like, which has no reactivity with blood and does not harm the human body. The thickness of the balloon according to the present invention is desirably about 0.01 to 0.3 mm, and the stretchability of the balloon is about 400 to 600 mmHg, preferably about 1.5 to 8 times. The size of the balloon according to the present invention, so that it can be used in the blood collection tube,
Those having a diameter of about 2 mm at normal pressure are desirable. The gas in the discriminator according to the present invention, for example, a balloon or bellows, is preferably an inert gas such as N2, Ar, He, or fluorocarbon which does not react with blood and does not harm the human body. As the pressing plate according to the present invention, a non-airtight, for example, net-shaped one that can sufficiently reduce the pressure below the pressing plate during suction of air in the blood collection tube is used. The color of the comparison plate according to the present invention is not particularly limited. However, if the color is different from that of the balloon, it is desirable to easily compare the size of the balloon with the comparison plate visually. The box according to the present invention may be a cylinder, a cube, a rectangular parallelepiped, a polyhedron, or the like, and may or may not be fixed in the blood collection tube. The holding plate, the comparison plate, and the box according to the present invention are mainly made of acrylic, polyethylene, or polypropylene, and the thickness of the holding plate and the comparison plate is usually preferably 0.2 to 0.5 mm. The adhesive used to attach the balloon, the holding plate, and the comparison plate according to the present invention to the blood collection tube has no reactivity with blood, does not harm the human body, and is mainly an acrylic non-water-soluble adhesive. Can be As the material of the bellows according to the present invention, a material having resilience and small elasticity is used, and particularly, a thin metal, resin, or the like is desirable.

[0007]

Embodiments of the present invention will be described below with reference to the drawings. First Embodiment (See FIG. 2) FIG. 1 is an explanatory view when blood is collected using the vacuum blood collection tube of the present invention, and FIG. 2 shows a first embodiment of the vacuum blood collection tube of the present invention.
Specifically, FIG. 2 is a longitudinal sectional view of a vacuum blood collection tube at (1) reduced pressure (2) normal pressure with a balloon attached to the bottom. 1 and 2, 1 is a vacuum blood collection tube, 2 is a discriminator, 3
Is a blood collection tube, 4 is a balloon that is the discriminator 2, 5 is a rubber stopper, 6 is a syringe, 7 is a syringe needle, and 8 is a skin on the arm. The vacuum blood collection tube 1 of the present embodiment has a rubber stopper 5 for holding the decompressed state in the blood collection tube 3 attached to the upper end of a cylindrical blood collection tube 3 having an open top capable of storing collected blood. Is a structure in which a spherical balloon 4 made of polyisoprene-based rubber is attached to the bottom of the balloon. An air suction device is attached to this blood collection tube 3,
The inside of the blood collection tube 3 is reduced to about 0.4 atm. In a blood test, when blood is collected from a blood vessel of a patient, one end of an injection needle 7 is pierced into the skin 8 of the arm, and the needle 7 is inserted into the rubber stopper 5 of the blood collection tube 3.
The pressure inside the blood collection tube 3 is checked before inserting the other end of the blood collection tube. That is, if the pressure inside the blood collection tube 3 is reduced, FIG.
As shown in (1), if the balloon 4 expands and the inside of the blood collection tube 3 is at normal pressure, the balloon 4 is compressed as shown in FIG. The pressure in 3 can be easily determined visually. After confirming that the inside of the blood collection tube 3 is in a depressurized state, the other end of the injection needle 7 is inserted into the rubber stopper 5 attached to the upper end of the blood collection tube 3, and blood from the blood vessel is collected. 3 is sucked inside. At this time, the pressure inside the blood collection tube 3 decreases, and the balloon 4 is compressed. FIGS. 3, 4 and 5 show modifications of the first embodiment. Specifically, FIG. 3 shows a balloon attached to the side (1) decompression (2)
FIG. 4 is a longitudinal sectional view of a vacuum blood collection tube at normal pressure. FIG. 4 is a cross-sectional view of a vacuum blood collection tube at normal pressure. FIG. 1 is a partial cross-sectional view of a vacuum blood collection tube at (1) reduced pressure and (2) normal pressure. As shown in FIG. 3, even when the balloon 4 is attached to the inner side wall of the blood collection tube 3, the balloon 4 can be identified by the appearance. Also, if a scale is attached to the outer wall of the blood collection tube 3, the size of the balloon 4 can be accurately determined by the scale,
The degree of decompression inside the blood collection tube 3 can be accurately determined. FIG.
As shown in FIG. 5, if characters or the like are written on the balloon 4 or the balloon 4 is formed into a star shape, the appearance of the expanded balloon 4 can be easily identified. Further, if a weight is attached to the balloon 4, the balloon 4 is prevented from floating, and is disposed below the blood collection tube 3, and the use of an adhesive is not required, which is safe for the human body.

Second Embodiment (See FIGS. 6 and 7) FIG. 6 shows a second embodiment of the vacuum blood collection tube of the present invention. Specifically, FIG. 6 is a vertical cross-sectional view of a vacuum blood collection tube at the time of normal pressure (1) decompression, (2) decompression, and FIG. FIG. 8 is a view as viewed from the line A, and FIG. 8 is a view as viewed from the line BB in FIG. In the figure, 9 is a holding plate for holding the balloon 4 at the bottom of the blood collection tube 3, 10 is a comparison plate for comparing the size with the balloon 4, 11 is a checking plate, 12 is a checking hole provided on the checking plate 11, and 13 is a holding plate This is a label attached to the plate 9. The vacuum blood collection tube 1 of the present embodiment shown in FIG. 6 has an acrylic holding plate 9 for holding the inflated balloon 4 so as not to float.
Is mounted on the balloon 4 and the holding plate 9 is provided with a vent hole through which gas enters and exits, and is larger in diameter than the balloon 4 made of polyisoprene rubber when compressed and smaller than the balloon 4 when expanded. This is a structure in which a comparative plate 10 made of acrylic is attached below the balloon 4. When the inside of the blood collection tube 3 is depressurized, the expanded balloon 4 can be seen from the bottom side of the blood collection tube 3 as shown in FIGS. 6 (1) and 7, and when the inside of the blood collection tube 3 is at normal pressure, FIG. As shown in FIG. 8, the holding plate 9 can be seen from the bottom surface side of the blood collection tube 3.
At this time, if the comparison plate 10 is translucent or opaque, the comparison between the comparison plate 10 and the balloon 4 is easy. Also, the comparison plate 10
Is transparent and has a color different from that of the discriminator 2, the comparison between the comparison plate 10 and the balloon 4 is similarly easy. FIG. 9 shows a modification of the second embodiment. Specifically, FIG. 9 is a view for judging the size of the balloon from the bottom surface of the blood collection tube through the confirmation hole. (1) Reduced pressure (2) A longitudinal sectional view of the vacuum blood collection tube at normal pressure, and FIG. FIG. 11 is a view as seen from the line, and FIG. 11 is a view as seen from the line DD in FIG. In the vacuum blood collection tube 1 of the present invention shown in FIG. 9, a confirmation plate 11 for confirming the decompression state is horizontally mounted below the balloon 4, and the confirmation plate 11 has a confirmation hole at a position shifted from the center thereof. The balloon 4 is attached at a position shifted from the center of the confirmation plate 11 in a direction opposite to the confirmation hole 12, and a label 13 having a diameter larger than the confirmation hole 12 is placed so as to be located directly above the confirmation hole 12. This is a structure attached to the holding plate 9. When the pressure in the blood collection tube 3 is reduced, FIG.
The balloon 4 can be seen from the bottom side of the blood collection tube 3 through the confirmation hole 12 as shown at 0, and when the inside of the blood collection tube 3 is at normal pressure, as shown in FIG. 9 (2) and FIG. Is the confirmation hole 1
The label 13 can be seen through 2. At this time, if the color of the label 13 is different from that of the balloon 4, it is easy to discriminate between the two. Further, the label 13 is not attached to the holding plate 9 and the balloon 4
If the color of the holding plate 9 is changed, the two can be distinguished. Furthermore, the degree of inflation of the balloon 4 can be confirmed by color-coding the color of the balloon 4 in a direction perpendicular to the inflation / expansion direction.
The degree of decompression inside can be determined.

Third Embodiment (See FIGS. 13 and 14) FIG. 13 shows a third embodiment of the vacuum blood collection tube of the present invention. Specifically, FIG. 12 is a perspective view of the box, FIG. 13 is a longitudinal section of a vacuum blood collection tube containing the box, and FIG. 14 is a plan view of FIG. 12 at (1) reduced pressure and (2) normal pressure. In the figure, 14 is a box, 14a is a box 1
Reference numeral 15 denotes an inner wall of the box, and 15 denotes a window provided in the box 14. The vacuum blood collection tube 1 of the present embodiment shown in FIGS. 13 and 14 stores a box 14 in a blood collection tube 3, attaches a balloon 4 filled with gas to one end inside the box 14, and Discriminator 2
The window 15 is provided so that the state of expansion and contraction can be determined. The gas in the blood collection tube 3 can freely enter and exit from the window 15. When the inside of the blood collection tube 3 is depressurized, the balloon 4 can be seen from the window 15 of the box 14 as shown in FIG. 14 (1). When the inside of the blood collection tube 3 is at normal pressure, as shown in FIG. Box 14 from window 15
Is visible. At this time, if the colors of the balloon 4 and the inner wall 14a of the box 14 are different, both can be easily identified. FIG.
5 and 16 show modifications of the third embodiment. Specifically, FIG. 15 is a perspective view of the flat box, and FIG. 16 is a plan view of FIG. 15 when (1) normal pressure and (2) pressure reduction. In the figure, reference numeral 17 denotes a flat box. The flat box 17 shown in FIGS. 15 and 16 is provided with a balloon 4 in two different colors at the center of the box and a window at the center of the upper surface of the flat box 17 so that the inflated state of the balloon 4 can be determined. Structure. When the inside of the blood collection tube 3 is at normal pressure, FIG.
The color of the upper part of the balloon 4 can be seen from the window 15 of the flat box 17 as shown in (1), and when the inside of the blood collection tube 3 is decompressed, as shown in FIG. Shows the color of the balloon 4 (indicated by dots). When a display plate 16 that moves in conjunction with the discriminator 2 is attached to the tip of the discriminator 2, the degree of decompression in the blood collection tube 3 can be accurately and easily determined. Furthermore, this display board 1
6 is classified into two or more colors in the direction perpendicular to the direction of expansion and contraction of the discriminating body 2, and if a specific color can be confirmed through the window 15 of the box
It can be determined that the degree of decompression in the blood collection tube 3 is sufficient and it can be used. In addition, along with the box 14 and the window 15 of the flat box 17,
4. If a scale is written on the outer wall of the flat box 17, the blood collection tube 3
The degree of decompression inside can be accurately determined, and it can be determined that it can be used if it exceeds a certain scale.

Fourth Embodiment (See FIGS. 17 and 18) FIG. 17 shows a fourth embodiment of a vacuum blood collection tube according to the present invention. Specifically, FIG. 17 is a perspective view of the box when (1) normal pressure (2) is depressurized, and FIG. 18 is a perspective view of (1) normal pressure (2) a polyhedral box when depressurized. In the figure, 20 is a box, 21 is a discriminator, and 22 is a polyhedral box. The vacuum blood collection tube 1 of the present embodiment shown in FIGS. 17 and 18 accommodates a box 20 in the blood collection tube 3, and a discriminator 2 made of polyisoprene rubber so as to close a window provided in the box 20.
1 is attached, gas is sealed in the box 20, and the inside is sealed. The discriminating body 21 attached to the window sets the internal pressure of the box 20 so that the inside of the blood collection tube 3 does not protrude from the outer wall of the box 20 when it is at normal pressure and is parallel to the outer wall. When the inside of the blood collection tube 3 is at normal pressure, the discriminator 21 does not protrude from the window as shown in FIGS. 17 (1) and 18 (1), but when the inside of the blood collection tube 3 is depressurized, FIGS. The discriminator 21 as shown in FIG.
Expands and comes out of the window. 20 and 21 show a modification of the embodiment of the vacuum blood collection tube of the present invention. Specifically, FIG. 19 is a cross-sectional view of a bellows, FIG. 20 is a cross-sectional view of a discriminator having an expandable and contractable waist, FIG. 21 is a cross-sectional view of a simple discriminator having an expandable and contractible waist, and FIG.
Is an explanatory diagram that determines the degree of decompression by installing a bellows in the box,
FIG. 23 is an explanatory view for judging the degree of decompression by attaching a color-coded display board to the bellows inside the box, and FIG. 24 is an explanatory view showing a state in which the display board is visible. In the figure, 16 is a display board, 18 is a bellows,
19 is a constriction. When the inside of the blood collection tube 3 is decompressed, the bellows expands and the display panel 1 is moved from the window 15 of the box 14 as shown in FIG.
When the inside of the blood collection tube 3 is at normal pressure, the bellows contracts and FIG.
As shown in (2), the inner wall 14a of the box 14 extends from the window 15 of the box 14.
Can be seen. The display plate 16 shown in FIG. 24 is classified into two or more colors, and the degree of reduced pressure in the blood collection tube 3 can be confirmed. In other words, when the inside of the blood collection tube 3 is at normal pressure, the color of the display panel (shown by dots) is visible from the window 15 of the box 14 as shown in FIG. As shown in (2), another color (indicated by a star) can be seen from the window 15 of the box 14. Further, in the discriminating body 2 having the constriction 19 which can be expanded and contracted, as shown in FIG. 20, the constriction 19 in the blood collection tube 3 expands when decompressed, and the constriction 19 in the blood collection tube 3 contracts under normal pressure. Further, a simple discriminator as shown in FIG.

[0011]

As described above, according to the present invention, since a balloon or bellows which can expand and contract according to a pressure change in the blood collection tube is provided in the blood collection tube, blood is sucked into the blood collection tube during blood collection. To determine whether the decompression state is sufficient
This can be performed very easily visually, and the long-term patient's pain caused by puncturing the injection needle can be reduced. In addition, by attaching the discriminator to the inner bottom portion or the inner side wall of the blood collection tube, the size of the discriminator can be easily determined from the appearance of the blood collection tube. In addition, by providing the balloon with a weight, it is not necessary to attach the balloon to the blood collection tube with an adhesive, so that it is possible to save time and effort for the operation and to enhance the safety to the human body. In addition, by writing characters or the like on the balloon, it is easy to determine when the balloon has expanded. Also,
By displaying the scale on the blood collection tube, the size of the balloon and the bellows can be accurately determined, and the degree of decompression in the blood collection tube can be accurately determined. In addition, the rising balloon is held down by the holding plate at the bottom of the blood collection tube, a comparison plate is attached to the bottom of the balloon, and the size of the balloon is compared with the balloon. Can be confirmed. In particular, if the comparison plate is translucent or opaque, the size of the comparison plate and the size of the balloon are easily compared, which is convenient. In addition, the rising balloon is held down by a holding plate at the bottom of the blood collection tube, and a confirmation plate with a confirmation hole is attached to the bottom of the balloon. You can check. In particular, if the holding plate has a color different from that of the balloon, it is easy to identify the two. The same effect as described above can be obtained by attaching the label to the holding plate so as to be located immediately above the confirmation hole. Above all,
If the label is different in color from the balloon, it is easy to identify both. In addition, by classifying the balloon into two or more colors in a direction perpendicular to the direction of expansion and contraction, the degree of expansion of the balloon can be confirmed, and the degree of decompression in the blood collection tube can be determined. In addition, storing the box in the blood collection tube makes it unnecessary to attach balloons or bellows with an adhesive, which is convenient. By changing the discriminating body in such a box to the color of the inner wall of the box, it is easy to discriminate both. Furthermore, by attaching a display plate to the tip of the balloon or bellows attached to one end of the box, the size of the balloon or bellows can be easily determined, and the degree of decompression in the blood collection tube can be confirmed. If such a display plate is color-coded and a specific color can be confirmed from the window of the box, it can be determined that the state of decompression is sufficient to collect blood and that the blood can be used. The same effect can be obtained when a flat box is used instead of the above-described box, a balloon is mounted at the center, and a window is provided at the center of the upper surface of the flat box. Also,
By providing a vent in the box, gas can freely flow in and out, and the inside of the box can be kept under reduced pressure.
Note that the window provided in the box is simple and desirable as long as it also functions as a vent. In addition, by displaying the scale along the window on the outer wall of the box, the degree of decompression in the blood collection tube can be accurately determined. Further, by using a bellows instead of a balloon, the same effect as described above can be obtained. Further, the cost can be reduced by using a discriminator having a simple structure having a constriction.

[Brief description of the drawings]

FIG. 1 is an explanatory diagram when blood is collected using the vacuum blood collection tube of the present invention.

FIG. 2 is a vertical cross-sectional view of a vacuum blood collection tube at (1) reduced pressure and (2) normal pressure with a balloon attached to the bottom.

FIG. 3 is a partial cross-sectional view of a vacuum blood collection tube at (1) reduced pressure and (2) normal pressure with a balloon attached to a side portion.

FIG. 4 is a partial cross-sectional view of a vacuum blood collection tube at (1) reduced pressure and (2) normal pressure, in which characters are written on a balloon.

FIG. 5 is a partial sectional view of a vacuum blood collection tube at the time of (1) decompression and (2) normal pressure in which a balloon is formed into a star shape.

FIG. 6 is a longitudinal sectional view of a vacuum blood collection tube at the time of (1) decompression and (2) normal pressure for judging the size of a balloon from the blood collection tube bottom surface side using a comparison plate.

FIG. 7 is a view as seen from line AA of FIG. 6;

FIG. 8 is a view as seen from the line BB in FIG. 6;

FIG. 9 is a longitudinal sectional view of a vacuum blood collection tube at the time of (1) decompression and (2) normal pressure for judging the size of a balloon from the bottom side of the blood collection tube through a confirmation hole.

FIG. 10 is a view as seen from line CC of FIG. 9;

FIG. 11 is a view as seen from the line DD in FIG. 9;

FIG. 12 is a perspective view of a box.

FIG. 13 is a longitudinal sectional view of a vacuum blood collection tube containing a box.

14 is a plan view of FIG. 12 at (1) reduced pressure and (2) normal pressure.

FIG. 15 is a perspective view of a flat box.

16 is a plan view of FIG. 15 at the time of (1) normal pressure and (2) pressure reduction.

FIG. 17 is a perspective view of the box at the time of (1) normal pressure and (2) pressure reduction.

FIG. 18 is a perspective view of a polyhedral box at the time of (1) normal pressure and (2) pressure reduction.

FIG. 19 is a sectional view of a bellows.

FIG. 20 is a cross-sectional view of a discriminating body having an expandable and contractible neck.

FIG. 21 is a cross-sectional view of a simple discriminating body having an expandable and contractible neck.

FIG. 22 is an explanatory diagram for determining a degree of decompression by attaching a bellows in a box.

FIG. 23 is an explanatory diagram for determining a degree of decompression by attaching a color-coded display plate to a bellows in a box.

FIG. 24 is an explanatory diagram showing a state in which the display board is visible.

FIG. 25 is a cross-sectional view of a conventional vacuum blood collection tube.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Vacuum blood collection tube 2 Discriminator 3 Blood collection tube 4 Balloon 5 Rubber stopper 6 Syringe 7 Injection needle 8 Skin 9 Suppression plate 10 Comparison plate 11 Confirmation plate 12 Confirmation hole 13 Label 14 Box 14a Box inner wall 15 Window 16 Display plate 17 Flat type Box 18 Bellows 19 Constriction 20 Box 21 Discriminator 22 Polyhedron

Claims (27)

[Claims] 1. A cylindrical vacuum blood collection tube containing blood having a rubber stopper attached to an upper end capable of maintaining a reduced pressure inside, a discriminator capable of expanding and contracting according to a change in pressure with a gas enclosed therein. A vacuum blood collection tube, wherein the blood collection tube is provided inside the blood collection tube. 2. The vacuum blood collection tube according to claim 1, wherein the discriminating body is a balloon having a gas sealed therein. 3. The vacuum blood collection tube according to claim 1, wherein the discriminator is attached to an inner side wall of the blood collection tube. 4. The vacuum blood collection tube according to claim 1, wherein the discriminator is attached to an inner side wall of the blood collection tube. 5. The vacuum blood collection tube according to claim 1, wherein a weight is attached to the discriminator so as not to float. 6. A holding plate for suppressing the floating of the expanded discriminating body is mounted horizontally below the blood collection tube, and is larger in diameter than the discriminating body at the time of compression and smaller than the discriminating body at the time of expansion. The vacuum blood collection tube according to claim 1 or 2, wherein a comparison plate for comparing sizes is horizontally mounted below the discriminator. 7. The vacuum blood collection tube according to claim 6, wherein the comparison plate is translucent or opaque. 8. The vacuum blood collection tube according to claim 6, wherein the comparison plate is transparent and has a color different from that of the discriminator. 9. A check plate attached horizontally below the blood collection tube to suppress the floating of the inflated discriminating body so that the state of expansion and contraction of the discriminating body can be determined. The vacuum blood collection tube according to claim 1, further comprising a confirmation hole. 10. The vacuum blood collection tube according to claim 9, wherein the holding plate has a color different from that of the discriminator. 11. The holding plate, wherein a label is attached so as to be located immediately above the confirmation hole.
Vacuum blood collection tube according to 0. 12. The vacuum blood collection tube according to claim 11, wherein the label has a color different from that of the discriminator. 13. The discriminator is perpendicular to the direction of expansion and contraction so that the color of the discriminator seen through the confirmation hole from the bottom side of the blood collection tube when the discriminator is compressed is different from the color seen when the discriminator is expanded. The vacuum blood collection tube according to any one of claims 9 to 12, wherein the blood collection tube is classified into two or more colors. 14. A cylindrical vacuum blood collection tube for storing blood, which is provided with a rubber stopper capable of maintaining a decompressed state inside at the upper end, wherein gas is sealed inside one end of a box housed in the blood collection tube. A vacuum blood collection tube, wherein a discriminator that can expand and contract with a change in pressure is mounted, and a window is provided in the box so that the state of expansion and contraction of the discriminator can be determined. 15. The vacuum blood collection tube according to claim 14, wherein a display plate that moves in conjunction with the discriminator is attached to a tip end of the discriminator in the direction of expansion and contraction. 16. The vacuum blood collection tube according to claim 15, wherein the display plate is color-coded in two or more colors in a direction perpendicular to the direction of expansion and contraction of the discriminator. 17. The box is a flat box having a flat shape,
15. The vacuum blood collection tube according to claim 14, wherein a discriminator is attached to a center of the flat box, and a window is provided at a center of an upper surface of the flat box so that a state of expansion and contraction of the discriminator can be determined. . 18. The discriminator is classified into two or more colors so that the color of the discriminator seen from the window when the discriminator is compressed is different from the color seen when the discriminator is expanded. Item 18. A vacuum blood collection tube according to Item 17. 19. The vacuum blood collection tube according to claim 14, wherein the window has air permeability. 20. The vacuum blood collection tube according to any one of claims 14 to 19, wherein the box is provided with a vent through which gas can freely enter and exit. 21. The vacuum blood collection tube according to claim 14, wherein a scale is displayed on an outer wall of the box around the window. 22. The vacuum blood collection tube according to claim 14, wherein a scale is displayed on an inner wall of the box seen from the window. 23. The vacuum blood collection tube according to claim 14, wherein the color of the discriminator is different from the inner wall of the box, which is visible from the window. 24. A vacuum blood collection tube on a cylinder containing blood having a rubber stopper attached to the upper end capable of maintaining a reduced pressure inside, a window on the outer wall of a box housed in the blood collection tube and filled with gas inside. And a discriminator attached to the window so as to be inflatable with a change in pressure. 25. The vacuum blood collection tube according to any one of claims 1 to 24, wherein the discriminating body is a bellows that can expand and contract with a change in pressure. 26. The vacuum blood collection tube according to any one of claims 1 to 25, wherein the discriminating body has a constricted portion that can expand and contract in the radial direction. 27. The vacuum blood collection tube according to claim 1, wherein a character, a figure, or a pattern is attached to the discriminator.